Chuck operating mechanism



joint betWeen said supply and exhaust ports, an annulaT oi1 groove in the opening thTo11gh said hnb, and ()il ducts leading fron1 Said annular groGve in the cheSt through the hub and cy1in der and into an annulaT groove surroundiI1g the drav bar Within the opening of the latteI' into the cyhnder.

9. The coInbination with a Totating n1en1ber having pasSages to 1 eceive uid under presSuTe with sloping Sealing SuTfaceS foTmed to inde pendently Teceive p1 esSuTe Supplied to said Inen1- ber, of a pTessuTe cheSt mounted on Said IneIn ber and having sealing suTfaces confOTIning in Shape to those on Said IneInber and also having ports each operating both as a supply and aS an exhaust poTt and each opening against one of Said sealing surfaceS and con1Inunicating with said paSSages.

10. The conlbination with a rotating IneInber having passages to Teceive fiuid under pressure with sealing SuTfaces foTmed to independently Teceive pTeSsure supplied to Said member and S10pi1g in opposite directionS one fron1 the other,

of a pressure cheSt Inounted on said nleInber and having Sealing suTfaceS conforIning in Shape to those on said IneTnber and also having ports each operating both as a Supply and as an exhauSt poTt and each opening against one df said seaJling surfaces and con1Inunicating with said paSSages.

11. T1e cOInbination vvith a rotating Inen1ber aving passages to receive nuid under resSure, said member having a bulge intermediate itS endS oTn1ing sealing s11Tfaces S1oping in opposite di TectionS one froIn the other to independently receive pfeSsuTe of a pressure chest mounted on Said Inen1ber and having sealing surfaces conforIning in shape to those on said IneInber and also having ports each operating both as a Sup ply and as an exhaust poTt and each opening againSt one of said Sea1ing surfaces and coInnunicating with said paSSages.

HABRY SLOAN. HABRY SLOAN, JR. GEORGE A. HIGHBBRG. 

